Pythagoras did not know 0 yet. My Decimal Pyramids begin with 0 and thus lend themselves to many discoveries, especially when we recognise the relevance of the Last Digit in determining prime or non-prime:
- “Digital Numbers” separate Leading from Last Digits as principal concept;
- “Last Digit Series” appear in Pyramids of Decimal Numbers;
- “Single Last Digit Patterns” illustrate the individual uniqueness of the Last Digits of odd numbers: 1 3 5 7 9;
- “Composite Last Digit Patterns” show visual or geo-metric relationships between NUMBERS by considering just their LAST DIGITS;
- “Digital Prime Diagonals” could also be called “Diagonal Digital Primes”, as we need to ask ourselves:-
- what is more important – the geometric appearance of diagonals
- or a pattern that Prime Numbers form on parallel diagonals?
All we can definitely say is: ‘geometric cell positioning’ shows that there is more to Prime Numbers than the question: sum or product?
NEXT: 1. Decimal Pyramids